Hand-hole plate for boilers.



H. D. KELLY.

HAND HOLE-PLATE FOR BOILERS.

APPLICATION men JAN-19,1914.

1,226,080. Patented May15,1917.

INVENTOH h *HENRY 1). KELLY, or KANSAS CITY, Missouri;

'i'iAiiD-riotn PLATE For, BoILERs.

To all whom it may/ concern;

Be it known that Ll-lint Y D. KELLY, a citizen of tlieUiiited states;tresidiii'g at Kansas City,.ii1the assay at Jackson and State oflhlissourr havein vented certain new and useful na revemtate inHand-Hole Plates for Boilers, of which the following is a specification;h h p h This invehtibn relates to haiidhole plates for boilers and 'llasfoi' its object the provision of a handliole plate which willeificiently seal the handhole opehing and yet be susceptible of andquick removal at frequent or infrequent intervals; a further objectbeingto prodube a construction in which the llandhole plate cannot be accidentally iembvbd from operative position and which embodies thedesirable features of simplicity, strength, durability and cheapness ofconstruction.

To these ends thefinvention consists in certain novel and. pec uliarfeatures of child struction and organization as hereinafter describedand pointed out in the appended claim, and in 1 order that it, may befully understood reference is to be had to the accompanying drawing, inwhich Figure 1, is a side elevation of a part of a coffee urn, equippedwith a handhole plate embodying my invention.

Fig. 2, is a central vertical section with the clamping lever member inelevation.

Fig. 3, is a central horizontal section. In the said drawing, 1indicates a boiler, 2 an opening therein and 3 a cast metal ring fittingin said opening and forming the hand-hole, the bore ofthe ring having aground surface 4, for a purpose which will hereinafter appear, and tosecure the ring firmly in position, it is provided with an outwardlyprojecting marginal flange 5 fitting against the outer side of theboilerand molded or otherwise properly and reliably secured thereto. r

6 is a pair of oppositely disposed perforated ears pro ecting outwardlyfrom the flange of the ringyand journaled in said ears are the reducedends 8 of the head 7 of a T-shaped clamping lever, the said head at itsjunction with the stem 10 having a cam portion 9 for a purpose whichhereinafter appears, and in-this connection it will be noted that onereduced. portion 8 of the head of the clamping lever is ofsufiicientlength to permit. the same to be slidend wise through its respective ear6 until the Specification of Letters Patent.

Patented May 15, 191%.

litpiicafidn fiiazianaary 19, 1914. seliamo. 813,055.

other end 8 is withdrawn iirom. engagement with its respective ear, thesaid ends fitting with sutlicient loosene'ss or play in the ears toenableithe lever to be readily withdrawn therefrom as is necessary ineffecting the removal of the handhole plate 11,. as hereinafte'rappears.

The plate 11 is of greater diameter than the bore of the ring and isprovided near its margin with a circular flange 12 having its externalsurface ground so as to fit the randeur-face at of the ring with awatertight relation. The said plate is also provided internally with acentral boss 13 and with ribs 14: reaching from the boss to the flange12, the boss and, ribs thus serving to flange 12-.

Projecting outwardly from the plate 11 is a pair of lugs 15 adapted toreceive between them the stem or handle end 10 of the clamping lever,and to lock the lever between said lugs and thus guard against itsaccidental operation, a bolt 16 is fitted through said lugs and the saidstem and is retained in position by a nut 17, it being understood thatthe clamping lever is thus secured when the cam portion 9 is hearingagainst the central portion of the plate 11 to hold the same firmly inplace.

Heretofore the handhole plates of coffee urns and other similar boilershave almost invariably been threaded into plates and if not removed atcomparatively frequent intervals would become cemented in place throughthe incrustations upon the threads of an alkali scale produced by theboiling of the water in the boiler. My object'is to provide aconstruction in which the actual joint between thehandhole ring andplate is so isolated and protected from the boiling water that it cannotbe affected, and I have accomplished this by establishing a ground jointrelation between the ring and the flange 12 of the handhole plate. As aresult the plate can be readily removed if left in place for any periodof time.

strengthen and stiffen the plate andas to bring the cam surface 9 tobearwith continuously increasing pressure on the center of the plate 11,this action continuing until the crest of the cam hasabout attainedthehorizontal planeiof the center of the plate, so that there will be notendency, due to the resiliency of the washer, ofthe plate movingoutward and throwing the clamping lever to inoperative position eventhough the latter is not fastened to the lugs 15, such fas-' teningmeans being provided solely as a precautionary measure against oneaccidentally clamping lever is in Copies of; this patent may be obtainedfor pulling or pushing the lever to inoperative position. After thelever turned to inoperative position it is moved laterally to with-cdraw one of its reduced ends from the bearing ears and then oscillatedslightly to enable its other end to be withdrawn from the other bearingear, after which the clamp plate can be withdrawn from position, itbeing obvious that 1t is impractical to with draw the clamping plate aslong as the ears 6. r Y

engagement with the a I 1 ,22e,oso

From the above description it will be ap- L,

, plate for boilers, embodying the features of advantage enumerated asdesirable, and I wish it to be understood that while I have illustratedand, described the preferred embodiment of the same, I reserve the rightto make all'changes falling within the scope of the appended claim.

I claim: I

A fastener forhand-hole plates for boilers comprising perforated earsrigid with the boiler, a T-shaped lever having a head portion of greaterdiameter than said perforations and formed with a cam at an intermediatepoint; said head being provided at its ends with reduced cylindricalextensions of unequal length, respectively engaging the perforations ofsaid ears, and screws engaging said reduced portions of the lever headand provided with heads of greater diameter than the perforations ofsaid ears and bear ing against the outer sidesof the same.

In testimony whereof, I afiiX my signature, in the presence of twowitnesses. I

HENRY D. KELLY. Witnesses:

G. W. DUVALL, K. M. THoRrE.

five cents each, by addressing/the Commissioner of Extent, Washington,D. G.

